Proxy options with Xchange

[archenroot]

Hi guys, in situation like being on production system without direct connectivity to internet, what are proxy options with xchange?

Also I heard that exchanges might block connections detected coming from proxies, is there any way to clean up proxies from being detected?

Thanks for any hints.

Ladislav

[daniloguimaraes]

@archenroot , XChange has a "built-in" option for proxy at ExchangeSpecification . Fields String proxyHost and Integer proxyPort.

These properties are used internally by rescu library at BaseExchangeService class

In my humble opinion, these 2 properties aren't enough, because sometimes we face an authenticated proxy. So, I would add String proxyUsername and String proxyPassword properties at ExchangeSpecification

Also, you could test the Java Networking Properties at your application and hopely, it will works.

[archenroot]

@daniloguimaraes Thank you very much for confirmation and hint. I will test it carefully. I was already under impression of using standard:

System.setProperty("http.proxyHost", "");
System.setProperty("http.proxyPort", "");

or using OS level proxy settin (can be set per user), but both actually apply JVM wide setting.

The way you describe is even more robust, because you can create 2 exchange instances, each with its own proxy within the same JVM, is my assumption correct?

Best regards,

Ladislav

[daniloguimaraes]

Yeah, @archenroot . When you use System.setProperty, will be applied to entire JVM.

Now, using specific exchange specification you can mix proxies (even no proxy).

Good luck.

[archenroot]

@daniloguimaraes Thx budy, I actually implemented new method in rescu code: https://github.com/mmazi/rescu/issues/104

But I am not sure if that is enough or not.

I also extended in Xchange code ExchangeSpecification by adding proxyUser and proxyPassword, but where is the exact place to inject the header? I am quite new to this codebase and although it is well documented, I am not sure simply :-)

[daniloguimaraes]

@archenroot , I suppose a simple example could be like this:

Exchange yourFavoriteExchange = ExchangeFactory.INSTANCE.createExchange(YourFavoriteExchange.class.getName());

ExchangeSpecification exchangeSpec = yourFavoriteExchange.getDefaultExchangeSpecification();

exchangeSpec.setProxyHost("localhost");
exchangeSpec.setProxyPort(8080);

yourFavoriteExchange.applySpecification(exchangeSpec);

// Now 'yourFavoriteExchange' instance is ready to connect through proxy.

[archenroot]

@daniloguimaraes Well, this is easy one, which works well already, but the extension with ProxyAuthorization HTTP header aka user name and password, where to put it?

[daniloguimaraes]

There is method in BaseExchangeService called getClientConfig() (check here)

This method already set up proxy host and port, if needed. You could open a PR to add proxy username and password as well.

[archenroot]

@daniloguimaraes - I will open PR definitely I work on fork already, I think the change will need to happen in rescu lib. But still investigating

[FedrBodr]

@archenroot how about the result of your research? Now I am got the same issue) And i start my own investigating

[ghost]

Hi, There's a way to set also username and password in the proxy settings?

[FedrBodr]

@archenroot i am not found/ Only realize it in xchange lib)

[bbottema]

Any update here? I also need to connect via authenticated proxy.

[mapleafly]

My Xchange is 5.0.0-SNAPSHOT. My code is ok. ExchangeSpecification exSpec = new BinanceExchange().getDefaultExchangeSpecification(); exSpec.setProxyHost("127.0.0.1");//edit youself exSpec.setProxyPort(50772);////edit youself Exchange exchange = ExchangeFactory.INSTANCE.createExchange(exSpec);

[elkceo]

@daniloguimaraes - I will open PR definitely I work on fork already, I think the change will need to happen in rescu lib. But still investigating

Hi. Did you get solution for entering proxy credentials to exchange specification?

[wodepig]

I also encountered the same problem, how to set up a proxy with' username' and' password' ------
Or you could look at this :https://github.com/knowm/XChange/issues/4555

[ArLeyar]

@archenroot Hey! Looks like you didn't create PR, I am struggling with same problem right now - I need to enter proxy credentials. Did you solve this problem?